Thermo-telephone or the like.



B. GWOZDZ.

THERMO TELEPHONE OR THE LIKE.

' APPLICATION FILED NOV. 15, l 9 12. 1 152,? PatentedSept. 7, 1915.

r an snares r BRONISLAW GWOZDZ, OE SCHfiNEICHE, NEAR BERLIN, GERIYIANY.

rnnnruo-rmnr sonn on one use;

1,152,623. Original application filed August 15,

To all "whom it may concern Be it known that I, BRoNIsLAw Gwoznz, asubject of the Czar of Russia, residing at Schiineiche, near Berlin, Germany, have i11 vented certain new and useful Improvements in Thermo-Telephones or the like, or" which the following is a specificatio My invention relates to thermo-telephones or the like of the type described in my United States Patent No. 998965, and is a division of my application No. 644,243, Aug. 15, 1911.";

In theLeX amples as described and ,illustrated in this patent a block'like body is used, WhiChCOHSiStS' of only one part and is producedlifor instance by a castingprocess assoon as the shape bf the Woll'aston wire has beendetermined and the wire is placed in a mold, In such constructions the Wollaston wire cannot be removed afterward fromthe cast. In many instances however it may beipreferable to prepare the blocklike bod-y, :tor instance by making it of individual parts, which, when united, secure the fie wollaston Wire inplace.

Some embodiments or the invention are represented byway of examplesin the accompanying. drawings, in which Figures 1, 2 and. i show forms in. which the body surrounding the l/Vollaston wire consists of two or more previously prepared parts. Fig. 3 shows another form of a previously prepared block. Figs. 5 and 6 show various forms of the lVollaston Wire adapted to be used in the prepared Q forms ofbody as illustrated in Fig. at and drical bodies 'are' placed one ":n'g'ainst the- Figs. 7, 8 and 9 show bodies of a fiat form,

several of which when placed one beside anj other result in numerous wire bows of great capability of performance.

In Figs. 1 and 2 the bloclelilie body consists of two halves 29, 30 of a'cylinder between which the suitably-shaped VVollaston wire 31 is arranged in the manner shown in the figures. When thesetwo semi-cylinother with a certain force, the wire or the limbs thereof are pressed to a certain extent into the material of the cylindrical body and are held securely, especially as the limbs of the Wollaston wires may be'.bent in'any form as represented in my'co pendmg application, so that the wire is prevented from being withdrawn. For uniting and securing these two halves of the his: ,5

. Specification ofLettersfPatent.

its entire length or onlynt one end. If ferred the holder and also the halvesof the possibly be shifted.

above. may be, similarly-coated. Of course in the thereinyin the latter case, however, holder must have a screw-hread because I provlde the Sept. '2', 2%5,

1911 Serial ms. 644,243, Divided and this application filer Hovember 15, 1912. Serial 1W. 731,558. r

the holderf32 of any resisting material, preterably of metal, shown in wo halyesof the block are inserted in the holder by employing pressure, to which end the holder and the block-or only oneofr" the,

two may be formed slightly conical along block may be provided with screw-thread so that the two halves the block can be screwed intot-he holder. it isto be understood that the position ofthe halves of the blockrelatively to the vVollaston wire 31 is regulated by employing templets or molds, so that's wire how 33 is produced of a quite definite length "which subsequently projects alone out of the bloclolike body and is alone subjected to the corrosive process.

----Fifg. 3 shows another form. Here 1 cmploy afpreviously prepared block 11 having two holes through the same for re ceivlng the limbs 31 of the Wollaston wire.

These holes may be of such a size that the wire can be readily passed through them. The block 11 preferably-consists of a somewhat yielding material, such as cork, indiarubber and the like, :so that when this block is placed in a holder, as represented in Fig.

2, the block is subjected to a certain compression. In consequence of this compression the body is not only securely hold in its'holder, but the limbs of the li ollaston wire are firmly'clamped so that they cannot The length. of the wire bow 33 projecting from the block is determined here also by means of a templet or mold, so that here also uniform products can be turned outon a large scale. If the block-like body does not consist of acidproof material, before it is inserted in a holder and, possibly, before the insertion of the lVollaston wire. it may be provided with an acid-proof coating'as described Likewise, the holder of the block preto serve as the hot wire is determined in a specially simple and uniform manner. As Fig. 4 specially shows, the one half 29 of the blockli ke body is provided with projections 35, while the other half 30 has corresponding recesses, so that when the two halves are placed t gether. the projections 35 enter into the recesses 36. These projections 35 which'may be of any desired shape, and of which there ma y be any desired number, simultaneously serve for securely positioning the \Vollaston wire itself. By means of pressure, bending, punching and like operations the \Vollaston wire may have imparted to it a form adapted to the projections 35. e. 9. that shown in Figs. 4 and 5,

havi'ng bends 37 of such size and so arranged that they can embrace the corresponding projection 35. Simultaneously, owing to the \Vollaston wire being held in this manner by the projections the length of the wire bow projecting from the block after the twohalves of the block have been united will obviously be determined. As mentioned above, the projections 35 may have any desired shape. A preferable form is one in which the Wollaston wire shown in Fig. 6 can be employed, said wire having lug-like projections 38 which are to be inserted into corresponding recesses in the projections 35. The wire is thereby secured in an exact and immovable position. The two halves of the block are united and secured by a holder as described above with reference to Fig. 2. It is of course clear that when a relatively very thick VVollaston wire is employed the abutting faces of the two halves of the block may be provided with groove-like recesses which correspond to the shape of the \Vollaston wire, so that when the two halves of the block are placed. together a groove is formed which exactly corresponds to the shape of the Wollaston wire.

The mode of assembling individual parts securing between them, when united, the Vollaston wire may also be used according to my invention when it is desired to form a hot-wire device of great capacity comprising aplurality of parts and a plurality of efiicient hot-wires. Such forms of my invention are shown in Figs. 79. The cast which carries the \Vollaston wire, the number of whose bows and, consequently, the shape of the same, may be as desired, preferably has the form of a flat rectangular disk, so that a plurality of such disks can readily be placed one beside another. 'In the illustrative embodiment shownin Fig. 7 the disk is formed by two halves 29 and 30, between which the wire is placed in the manner shown in Fig. 4. As shown in the upper part of Fig. 7, the halves of the block preferably have in their abutting faces grooves 30 whose depth is equal to half the diameter of the WVollaston wire and whose shape corresponds to the section thereof. The halves of the block to be united are here also preferably provided with projections 35 and recesses 36 which assure their correct relative position when they are united. In the illustrative embodiments shown in Figs. 8 and 9 a yielding material, such as cork, india-rubber or the like, may be used, as in the embodiment shown in Fig. 8. The wire has two bows 41 which project out of the cast 89 and are connected one with the other by a loop 1'2. The latter and the limbs 40 of the wire are in the cast. Such disk-like hot wire devices made according to either Fig. 7 or Fig. 8 are then inserted in the manner which will be understood from Fig. 9 and from the description with reference to Fig. 2, in

.a metal holder 32, any suitable number of the devices being placed one beside another and the projecting bows 41 resting in a mold provided with suitable recesses. The holder 32 may be cylindrical or angular and is preferably simultaneously used as a contact-piece, one of the lVollaston wires, 6. g. 40, being metallically connected with the holder. The remaining wire ends a re united in the manner understood from Fig. 9 by twisting or soldering them together, or otherwise, and thereby connected in the requisite manner, and lastly, a loop 40 is made, preferably likewise out of the Wollaston wire, which projects somewhat to: wa d. the edge of the holder The entire denlice is now filled with a suitable mass which, on the one hand, unites the various hot-wire devices, and, on the other hand. produces out of these individual devices together with the holder, 32 one compact entirety, from which a large number of hot wires projects on the one side, while on the other side only the loop 40 projects which is for use as a contact-piece.

In hot-wire device as shown, in which the hot wire proper has the form of one or more wire bows projecting from one part of the block-like cast, it is possible that this fine hot wire, which is scarcely visible, may be injured. In order to prevent this and to render such hot-wire devices capable o 1. being readily packed and despatched and, also, to be able readily to insert and remove them from a telephone I prefer to employ a special protecting device or guard. This is a simple cap rendered elastic by means of incisions or in other manner, so that it can be pushed tightly on the block-like cast and subsequently removed therefrom. This cap preferably has a projecting edge so that it.

can be readily grasped by the lingers or the finger-nails. The bottom of the cap is formed as a hell whose shape approximately corresponds to the wire bow, so that the lattersecurely rests in the bell and nowhere contacts with the wall of the cap. This cap may be made of any desired material, e. g.

aluminium, celluloid or the like, and is preferably placed on the block immediately after the hot-wire device has been made, so that the hot wire is placed'in the hot-wire device can readily be packed and despatched. As soon as the hot-wire device is placed in a telephone the protective cap is, of course, removed.

In the above, it has been stated that the variously constructed hot-wire devices are intended for thermo-telephones. It is, however, obvious that such hot-wire devices or those having differently shaped cast bodies can also .be employed for all other apparatus in which electrothermic actions occur, 6. g. for bolometers and the like. The employment of these hot-wire devices in the manner last described is therefore also comprehended in the present invention. Further, a Wollaston band instead of a Wollaston wire may obviously be employed within the scope of the invention.

What I claim is 1. In a thermo-telephone or the like the combination with a body consisting of two halves, of a Wollaston wire separately mounted between the halves, said halves having means for assuring the correct relative position thereof, when united, and means for securing the wire in the said body.

2. In a thermo-telephone or the like the combination with a body consisting of two parts, of a Wollaston wire separately mounted between the parts, the parts being provided with projections and recesses for assuring their correct relative position when united, and means for securing the wire in ,the said body.

3. In a thermo-telephone or the like the combination with a body consisting of two parts, of a Wollaston Wire separately mounted between the parts, the parts being provided with projections'and recesses for assuring the correct relative position of the parts and of the wire, and means for secur ing the wire in the said body.

4. In a thermo-telephone or the like the combination with a body consisting of two safety and parts and of the wire, and a cylindrical holder surrounding the body the said wire in the body. v

6. In a thermo-telephone or the like the and securing combination with a body formed of a plurality of bodies each consisting of two halves, of WVollaston wires separately mounted between the halves, the latter being provided with projections and recesses for assuring the correct relative position of the halves and of the wires, the wires of the bodies being electrically connected in a suit able manner, and a holder securing the wires in the bodies.

7. In a thermo-telephone or the like the combination with a body formed of a plu-. rality of bodies each consisting of two separately.

halves, of WVollaston Wires mounted between the halves, the latter being provided with projections and recesses for assuring the correct relative position of the halves and of the wires, the wires of the bodres being electrically connected in a suitable manner, a holder securingthe wires in the bodies, one end of the connected wires being attached to the holder and the other end projecting out of the holder.

In testimony, that I claim-the foregoing as my invention, I havesigned my name in presence of two subscribing witnesses.

, BRONISLAW GWOZDZQ Witnesses:

HENRY HASPER, WOLDEMAR HAUPT.

Copies of this patent ma; be obtained for five cents each, by addressing the Commissioner of latents,

Washington, 31-6. 

